Energizer Ultimate Lithium 9V Batteries (2 Pack), Lithium 9 Volt Batteries

Energizer are definitely the best lithium batteries. They are longer lasting and tend not to break open and leak ruining my equipment. I selected the Ultimate Lithium 9V batteries for my smoke alarms. These should last 2 to 3 years and maybe longer. Tired of changing smoke alarm batteries at 3 AM which is when they seem to fail. No I change them before they fail.

I needed new 9v batteries for my safe and saw that energizer 9v lithium are the best and so far my safe opens on the 1st or 2nd code input. Great quality, slightly expensive but well worth it.

So I see several reviews complaining about these not lasting 10 years, these have a 10 year SHELF LIFE not a 10 year USE LIFE- those are 2 entirely different things. 10 year shelf life refers to how long these will be viable for sitting on a shelf/stored not plugged into anything. As far as actually putting these into something you can expect use-life to be about the same as a typical 9V or a little longer. I bought these to power the Fishman Fluence active pickups in my guitar because these types of batteries provide very consistent power - which is where these excel compared to your average alkaline 9V which can waver a little in power getting worse over time. The only issue with these is they will suddenly die out on you once they are done but they will give you the same consistent power until its last breathe. Who these are for: -People who have devices/uses that require very consistent power. -People using devices that are subjected to more extreme temperatures. -Expensive devices that could be destroyed by a small battery leak. -People who like to store up on back-up batteries for a long time for later use. Who these are NOT for: -People who think 10 year shelf-life is the same as 10 year use-life. -People looking for rechargeable batteries (these are NOT the same as rechargable lithium batteries) *NOTE: These are very close to the size of your average alkaline battery but ever so slightly bigger since the edges are not rounded so if you want to put these into something where the battery space is a very tight fit it might not fit.

ALWAYS PERFECT EVERY TIME! Nothing beats these batteries. I use them in a Sure wireless mic pack and these batteries consistently outperform every other battery on the market! These last weeks without needing to be replaced! HELPFUL WARNING: DO NOT DO NOT DO NOT use these batteries for any types of alarms (smoke, CO, etc) or electronic door locks. Stick to Alkaline batteries for those devices.

These are outrageously expensive compared to an ordinary 9V battery. However, I gladly pay for these to use in my smoke detectors. Even living in a small condo, I have a total of eight detectors between CO and smoke detectors. All are hard-wired but with a battery backup. Every couple of months, one would get a low battery, and start chirping in the middle of the night. It's always the middle of the night. I finally got irritated and bought a bunch of these. They claim a 10-year lifespan; I presume that is shelf life. With a small bit of electricity used as a backup power source in these detectors, I'm getting about a 4-5 year run before they start to chirp. (My advice: when one starts to chirp, rather than trying to track down which it is, replace all of them together. They're going to start to fail at roughly the same time so you're in for a month or two of random sleepless nights. It's a weird luxury of sorts to only have to deal with this problem twice a decade, and is absolutely worth the money.) There is one catch -- regular 9V batteries have slightly rounded corners, but these do not. This makes them a very tight fit into some of my smoke detectors. You might want to buy something like this 2-pack and test-fit them everywhere before buying a bulk lot of them.

I have so many smoke detectors in my house that I really don't want to change the batteries so often. So I decided to pick these up as they're supposed to last as long as the detectors do (~10 years). They seem to work very well and I had no complaints. Yes, they're a bit expensive, but they're very easy to put in the smoke detectors and overall I have no complaints. 10/10 would buy again.

prompt shipping and these seem to be the best 9v batteries at this time due to no leakage etc.

Made a huge difference in my monoxide monitoring

Absolutely the best battery for guitar pickup Lasts seemingly forever !! Ok not forever but at least 1 year on my LRBaggs pickup anthem. About double the time compared to alkaline 9v for me

A+

If you need batteries, personally, I feel these are the best. They last a very long time. Good quality cost a little more but you get what you pay for.

Bought for backup for two wired in smoke alarms with ten year expiry matching the shelf life of the batteries. I’ll check back in ten years and let you know if they did the job!

pefect item. works under minus 30 C outdoor